Written by hackers for hackers, this hands-on book teaches penetration testers how to identify vulnerabilities in apps that use GraphQL, a data query and manipulation language for APIs adopted by major companies like Facebook and GitHub.

Web applications are increasingly using the query language GraphQL to share data, but the security of these useful APIs is lagging behind. Authored by the developers of widely used GraphQL security-testing tools, Black Hat GraphQL will teach you how to find and exploit flaws in this technology.

Early chapters provide in-depth knowledge of GraphQL and its query language, as well as its potential security pitfalls. Readers will then be guided through setting up a hacking lab for targeting GraphQL applications using specialized GraphQL security tools. They will learn how to conduct offensive security tests against production GraphQL systems by gleaning information from GraphQL implementations during reconnaissance and probing them for vulnerabilities, like injections, information disclosure, and Denial of Service.

Dolev Farhi is a security engineer and author of Black Hat Bash (No Starch Press, forthcoming in 2025). He has extensive experience leading security engineering teams in the Fintech and cybersecurity industries and is currently a distinguished security engineer at Palo Alto Networks, where he builds defenses for the largest cybersecurity company in the world. He has provided training for official Linux certification tracks and, in his spare time, enjoys researching vulnerabilities in IoT devices and building open source offensive security tools.


Nick Aleks is a leader in Toronto's cybersecurity community and a distinguished and patented security engineer, speaker, and researcher. He is currently the Senior Director of Security at Wealthsimple, leads his own security firm, ASEC.IO, and is a Senior Advisory Board member for HackStudent, George Brown, and the University of Guelph's Master of Cybersecurity and Threat Intelligence programs. A founder of DEFCON Toronto, he specializes in offensive security and penetration testing and has over 10 years of experience hacking everything from websites, safes, locks, cars, drones, and even smart buildings.